Eight endangered black rhinos have died while being transported to a new wildlife reserve in Kenya, BBC reports.
They died after drinking water with high concentrations of salt, the Kenyan government says.
The animals were among 14 black rhinos being transported from Nairobi National Park to the country's biggest national park, Tsavo East.
Estimates suggest there are fewer than 5,500 black rhinos in the world, all of them in Africa and some 750 in Kenya.
Kenya Wildlife Service vets believe the more the animals drank, the thirstier they became, which quickly lead to salt poisoning, although an independent investigation has been launched to confirm the cause of death.